JP2002051535A - Electric drive system of scooter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the electric drive system of a scooter for covering a power supply for drive motors for oneself without mounting a battery for power supplies. SOLUTION: The drive system is composed of a self-generating motor, an electric double-layer capacitor, and a DC drive motor, the electric double-layer capacitor is connected in series with the drive motor, and one end of the electric double-layer capacitor and that of the drive motor are connected to the output end of the DC power being generated by the self-generating motor. Also, a means for charging the electric double-layer capacitor when needed is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric drive system used for a so-called scooter or mini-bike with a motor.

[0002]

2. Description of the Related Art Conventionally, bicycles have been mainly used as means of transportation for young people, but nowadays, the number of young people who use motorbikes, so-called scooters and mini-bikes, are increasing. The number is increasing year by year. Although a very small gasoline engine with an engine volume of 50 cc is used as the power source of the scooter or mini-bike, the substance causing air pollution is emitted to a considerable extent even though the engine capacity is 50 cc.

[0003] However, scooters and mini-bikes have an extremely small engine volume compared to automobiles.
At present, there is not much close-up as a cause of air pollution.However, the number of vehicles is increasing year by year, and regular inspections are not carried out very much. The potential for this is very high in the near future. Therefore, a motor can be used as a drive source like a car, but since there is almost no space for a battery for power supply, it is not easy to electrify a scooter or mini-bike.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide an electric drive system for a scooter that can supply power for a drive motor by itself without mounting a power supply battery. It is assumed that.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to provide an electric drive for a scooter comprising a self-powered DC motor having a motor and a generator, a capacitor, and a DC drive motor. A system, wherein the capacitor and the drive motor are connected in series,
An electric drive system for a scooter, wherein one end of the capacitor and one end of a drive motor are connected to respective positive and negative output terminals of the generator. The scooter includes a motorbike and a small motorcycle such as a mini motorcycle.

The present invention will be described in further detail. A self-power generation type DC motor is one in which a motor and a generator are configured as described above, and one of them is provided with a DC motor that operates by receiving DC power. A motor provided with a generator which rotates by receiving the rotational force of the DC motor, or a rotor comprising a permanent magnet and an armature provided with an induction coil for power generation. The generator rotates to generate electric power.

The output of the generator is rectified from AC to DC by a rectifier, a part of the output power is supplied as power of a DC motor for rotating the generator, and the other is a driving power for running the scooter. Is supplied to a DC drive motor connected in series with a capacitor.

A self-generating motor using a YT magnet (trademark) devised by the present inventor is suitable as a self-generation type DC motor, and the power generated by the generator is attenuated by use of the self-generating motor. Is supplied to the DC motor again as electric power of the DC motor. This self-generating motor
This is a DC brushless motor in which a permanent magnet having a high BHmax is provided in the rotor magnetic pole in the axial direction of the rotor, and an induction coil for power generation is provided in the field winding of the armature. The motor side is equipped with a control system, and the generator side is equipped with a rectifier.

More specifically, the high B provided at the magnetic pole of the rotor
Hmax permanent magnets have a BHmax value of at least 50 MG
It is a permanent magnet having Oe or more, preferably 100 MGOe or more, and having a permeance coefficient of 1.0 to 4.0, preferably 2.5 to 3.5. A permanent magnet that satisfies this condition is a YT magnet (trademark). This magnet has Co—Fe—Y as an inner layer and Fe—N
It is a permanent magnet having a double structure with dB as an outer layer.

This magnet is a permanent magnet characterized by an extremely large coercive force when demagnetized, and has various performances. A magnet having a BHmax value exceeding 100 MGOe and a permeance coefficient of approximately 3 is suitable. I have. This permanent magnet is used as a part of the iron core of the rotor, and is buried and stored in the iron core. Since the permanent magnet having the high BHmax is used, a large amount of energy is generated. If an induction coil is provided in addition to the field winding of the armature, the electric energy can be extracted. That is, this is a self-generating motor.

The driving motor for the scooter travel is not particularly limited, and a suitable DC motor may be selected. The capacitor may be provided with a charging means for charging the capacitor when necessary, and any charging means may be used. This capacitor may be of any type, such as a large capacity or a small capacity, as long as it has a specification compatible with the use environment. . Further, an electric double layer capacitor having a small capacity since it is connected in series with the drive motor may be used.

In general, an electric double layer capacitor is a capacitor in which a positive electrode and a negative electrode comprising a polarizable electrode and a collector electrode and an electrolyte and a separator or a separator impregnated with the electrolyte are interposed between the electrodes. It is. For more information,
The polarizable electrode is made by kneading activated carbon such as coconut husk, and it is usually formed in a sheet shape. The polarizable electrode is connected to a lead wire of an external lead, and is attached to a collecting electrode made of a metal such as a thin platinum plate, aluminum, or stainless steel. One of the collector electrodes is a positive electrode and the other is a negative electrode. An electrolytic solution and a separator or a separator impregnated with the electrolytic solution are interposed between the collector electrode and the electric double layer capacitor.

In particular, the electric double layer capacitor devised by the present inventor is characterized in that the polarizable electrode has a size of 1000 to 3000 m ²
/ Tg, which is made of activated carbon of coffee beans having a specific surface area of 0.2 g / g.
-Fe-Y as an inner layer and Fe-Nd-B as an outer layer 2
A permanent magnet having a heavy structure is embedded. This activated carbon is basically used in the form of granules, but it is manufactured by kneading it with a binder such as polytetrafluoroethylene to form a sheet, stacking it on a collector electrode such as aluminum and winding it up. . Alternatively, a phenolic resin may be mixed, pressed, heated and carbonized, and sintered to form an electrode. And YT magnet (trademark) is 1m
It is formed to a thickness of about m and buried in the collecting electrode.

[0014]

The electric drive system for a scooter according to the present invention is constructed as described above. First, the capacitor is charged by the charging means, and the self-generating motor is started by the charged power. The generator rotates by the rotation of the motor to generate AC power. The generated AC power is converted into DC power by a rectifier and output.

A part of the output DC power is supplied to the self-generating motor as motor power.
Since this power is input with its attenuation compensated at the time of motor input, the motor can maintain a constant rotation speed. Others are supplied as driving power for running the scooter to a DC driving motor in which a capacitor is connected in series. The electric power is stored in the capacitor and supplied to the drive motor.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic circuit diagram of an electric drive system for a scooter according to the present invention. FIG. The SGM (self-generating motor) is started by the electric power of the electric double layer capacitor, and the rotation of the motor rotates the generator to generate AC power. This AC power is converted into DC power by a rectifier and output. In this example, power generation of DC48V100A was possible. A part of the output DC power is supplied as motor power of the self-generating motor via the controller system. Others are supplied as driving power for running the scooter to a DC driving motor in which a capacitor is connected in series.

FIG. 2 is a schematic configuration diagram of the electric scooter. Reference numeral 1 denotes a power generator storage unit, which is equipped with the SGM, electric double-layer capacitor, charger and the like shown in FIG. 2 is a drive motor for running the scooter, 3 is a charger housing, 4 frames, 5 is a front wheel, 6 is a rear wheel, 7 is a steering wheel,
8 is an instrument panel on which instruments such as a voltmeter, an ammeter and a speedometer are provided, 9 is a speed control lever for controlling the drive motor 2, 10 is a headlight, 11 is a rearview mirror, 1
2 is a tail light, 13 is a seat 14 and a stand. In this figure, the drive motor 2 is set apart from the drive rear wheel 6 to transmit the rotation by a chain or the like. However, the drive motor 2 is set beside the rear wheel 6 to rotate directly. May be transmitted.

[0018]

As described above, the electric drive system for a scooter of the present invention uses a self-generating motor as described above, so that the electric power of the motor driving the generator can be covered by the electric power generated by the self-generating motor. It is not necessary to mount a required power supply battery. Since this electric drive system has few components, it can be easily changed from a conventional gasoline engine type scooter to an electric type scooter, and since the electric drive system can be configured at low cost, electric scooters are offered at low cost You can also.

[Brief description of the drawings]

FIG. 1 is a schematic circuit diagram of an electric drive system for a scooter according to the present invention.

FIG. 2 is a schematic configuration diagram of an electric scooter.

[Explanation of symbols]

1-generator housing, 2-drive motor, 3-charger housing, 4-frame, 5-front wheel, 6-rear wheel, 7-handle, 8-instrument panel, 9-speed control lever, 10-head Light, 11-back mirror, 12-tail light, 13
-Seat, 14-Stand

Claims (2)

[Claims] 1. An electric drive system for a scooter comprising a self-powered DC motor having a motor and a generator, a capacitor, and a DC drive motor, wherein the capacitor and the drive motor are connected in series. An electric drive system for a scooter, wherein one end of a capacitor and one end of a drive motor are connected to respective positive and negative output ends of the generator. 2. The electric drive system for a scooter according to claim 1, wherein said capacitor charging means is provided in a system circuit.